Update bitnami/elasticsearch-exporter Docker tag to v1.6.0-debian-11-r50

This MR contains the following updates:

Package	Type	Update	Change
bitnami/elasticsearch-exporter	ironbank-docker	minor	1.5.0-debian-11-r17 -> 1.6.0-debian-11-r50
bitnami/elasticsearch-exporter		minor	1.5.0-debian-11-r17 -> 1.6.0-debian-11-r50
bitnami/elasticsearch-exporter	stage	minor	1.5.0-debian-11-r17 -> 1.6.0-debian-11-r50

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